There are no catkins blowing up due to the wind, only sunflowers blooming towards the sun

It means: There are no catkins blowing in the wind, only sunflowers blooming towards the sun. It comes from "Early Summer in Guesthouse" by Sima Guang, a poet of the Song Dynasty. The whole poem is as follows:

In April, the rain suddenly clears, and the weather in Nanshan is clear.

There are no catkins blown up by the wind, only sunflowers leaning toward the sun.

Extended information:

"Early Summer in Guesthouse" is a seven-character quatrain written by Sima Guang, a poet in the Song Dynasty. By contrasting the scenery of early summer, especially the contrast between catkins and sunflowers, the poet implicitly describes the poet's own political ambitions, that is, never to be opportunistic in politics or to agree casually, but to be as loyal to the emperor as the sunflowers.

The poet compared Wang Anshi and others to "catkins" and compared himself with "sunflowers" to express the poet's loyalty to the king.

Reference: Baidu Encyclopedia_Ke Zhong Early Summer